A3150J データシートの表示（PDF） - Allegro MicroSystems

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A3150J

PROGRAMMABLE, CHOPPER STABILIZED, HALL-EFFECT SWITCH

Allegro MicroSystems 

3150

PROGRAMMABLE, CHOPPER-

STABILIZED, PRECISION,

HALL-EFFECT SWITCH

Address Determination. The operate point is adjust-

able in 64 increments. With the appropriate target or gear*

in position, the 64 switch points are sequentially selected

(figure 2) until the required operate point is reached. Note

that the difference between the operate point and the

release point (hysteresis) is a constant for all addresses.

Set-Point Programming. After the desired set-point

address is determined (0 through 63), each bit of the

equivalent binary address is programmed individually. For

example, as illustrated in figure 3, to program address code

5 (binary 000101), bits 1 and 3 need to be programmed.

Each bit is programmed during the

wide VPP pulse and is not reversible.

Lock Programming. After the desired set point is

programmed, the program lock is then activated (figure 4)

to prevent further programming of the device.

VPH

VPL

0

td(1)

td(0)

Dwg. WH-014

Figure 2 — Address determination

VPP

PROGRAM ENABLE

BIT 3 PROGRAM

(000100)

ADDRESS 4

PROGRAM ENABLE

VPH

VPL

td(1)

0

td(1)

td(0)

tdP

Figure 3 — Set-point programming

Dwg. WH-015

VPP

PROGRAM ENABLE

LOCK PROGRAM

(65 PULSES)

VPH

VPL

td(1)

td(1)

td(0)

0

Figure 4 — Lock programming

* In application, the terms “gear” and “target” are often

interchanged. However, “gear” is preferred when motion

is transferred.

tdP

Dwg. WH-016

www.allegromicro.com

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